Isabelle and Fiona,
I was not going to post to this thread again, but now that you have both commented, I do want to explain my position, and I hope no one will see it as rude or hostile. In the last two days I have thought a lot about WikiTree, and G2G, and my interactions with others, both on G2G and with the Rangers. I believe I have a coherent position, which I have not yet fully explained.
First, I am in favor of free speech, nearly all the time, except when it is aggressively rude. Of course, everyone has his/her idea of what that is. And then, of course, people have the right to criticize others, again best if they are not aggressively rude, and if they don't drag on the debate to boring lengths. But I don't want to see us hiding reasonable debate because some sensitive people might feel offended.
Second, I am in favor of free information. I don't want you to think that it just didn't occur to me that people who have been dead for less than 100 years could have living children. I understand that. But in the age of the internet, newspapers.com, Ancestry.com, state-sponsored vital records on-line, public obituaries, and so many other things, I don't believe it is realistic to think that anyone can conceal records about themselves, let alone their long-dead parents. If I wanted to, I imagine I could put your grandparents on my Ancestry tree and then any subscriber could see the records that are not available on WikiTree. I doubt that WikiTree wants to go through another debate, or offend a segment of its existing members, but nevertheless I think we are behind the times.
Editing to add: Don't we join WikiTree, or do genealogy wherever we do it, to learn about our families and to share information with others? Don't we want to learn how we are related to one another? How is it helpful for people to conceal information?
Note: Subject to future edits for clarification.